存储过程

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CREATE OR REPLACE PROCEDURE P_ADD_EMP(ENO         IN NUMBER,
                                      EMPNAME     IN VARCHAR2,
                                      EMPJOB      IN VARCHAR2,
                                      EMPMGR      IN NUMBER,
                                      EMPHIREDATE IN DATE,
                                      EMPSAL      IN NUMBER,
                                      EMPCOMM     IN NUMBER,
                                      EDEPTNO     IN NUMBER,
                                      RCODE       OUT NUMBER) IS
  V_CODE NUMBER(1) := -1;
  V_SQL  VARCHAR2(200);

BEGIN
  IF ENO IS NULL THEN
    RCODE := -1;
    RETURN;
  END IF;
  -- 查找数据库中是否已存在要添加的empno
  SELECT COUNT(EMPNO) INTO V_CODE FROM EMP WHERE EMPNO = ENO;
  IF V_CODE > 0 THEN
    --如果已经存在要添加的empno
    RCODE := 1;
  ELSE
    -- 查找数据库中是否已存在deptno
    SELECT COUNT(DEPTNO) INTO V_CODE FROM DEPT WHERE DEPTNO = EDEPTNO;
    IF V_CODE > 0 THEN
      -- 如果已经存在deptno,则允许添加emp  
      INSERT INTO EMP E
      VALUES
        (ENO,
         EMPNAME,
         EMPJOB,
         EMPMGR,
         EMPHIREDATE,
         EMPSAL,
         EMPCOMM,
         EDEPTNO);
      RCODE := 0;
      COMMIT;
    ELSE
      RCODE := 2;
    END IF;
  END IF;
EXCEPTION
  WHEN OTHERS THEN
    RCODE := 3;
    ROLLBACK;
END P_ADD_EMP;
/